Pore Former Addition in the Preparation of Highly Porous Anode Using Phase-inversion Technique for Solid Oxide Fuel Cell

Authors

1 Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM JB, Johor, Malaysia.

2 Advanced Membrane Technology Research Centre (AMTEC), Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310 UTM JB, Johor, Malaysia

3 Advanced Membrane Technology Research Centre, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, MALAYSIA.

Abstract

Detailed study on the anode structure of the solid oxide fuel cell (SOFC) is very crucial in developing high performance power generating devices as it is known that porous electrode will provide a number of active sites for reaction and thus will accelerate the fuel conversion. The present study investigates the feasibility of pore former addition in nickel oxide-yttria stabilized zirconia (NiO-YSZ) anode fabricated via phase inversion-based casting and sintering technique. The loading of two types of pore former (i.e. polyetheretherketone [PEEK] and corn starch) was varied from 0 to 10 wt % to total suspension. The effects of pore former loading and type were examined on anode morphology using scanning electron microscopy (SEM), crystal phase by X-ray diffraction (XRD), apparent porosity based on standard ASTM C373-88, and bending strength using three-point bending test. Results show that higher loading of pore former increased the porosity but significantly reduced the bending strength. SEM images of anode showed that the addition of 2 wt.% PEEK produced an effective porous structure by generating more connected open pores. Besides, the sample was recorded 67 % mechanically stronger compared to the best loading of corn starch (4 wt.%). Based on these findings, PEEK can be used as pore former in anode fabrication that creates appropriate porosity, thus benefits gas diffusion and provides good mechanical strength as an anode support.

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Articles in Press, Accepted Manuscript
Available Online from 04 May 2018
  • Receive Date: 06 November 2017
  • Revise Date: 12 January 2018
  • Accept Date: 04 May 2018